{"id":5217,"date":"2026-09-18T07:51:09","date_gmt":"2026-09-18T07:51:09","guid":{"rendered":"https:\/\/www.henghuahose.com\/?post_type=product&p=5217"},"modified":"2026-09-18T07:51:10","modified_gmt":"2026-09-18T07:51:10","slug":"orfs-male-o-ring-adapter-1f","status":"publish","type":"product","link":"https:\/\/www.henghuahose.com\/pt\/product\/orfs-male-o-ring-adapter-1f\/","title":{"rendered":"1F Adapter – ORFS Male O-Ring Flat Face Hydraulic Adapter (SAE J1453)"},"content":{"rendered":"
The 1F adapter is a straight ORFS male stud with a flat face O-ring seal at both ends, made to SAE J1453. It joins two ORFS connections and carries the elastomeric O-ring in a groove machined into each flat sealing face.<\/p>\r\n\r\n\r\n\r\n
Both connection ends must match their mating port exactly in thread size, face diameter and O-ring size, because an ORFS joint seals on the flat face against the O-ring and not on the thread. That exact match is the precondition for eliminating leakage at the conversion point.<\/p>\r\n\r\n\r\n\r\n
Sealing principle of this series: each end is a male ORFS stud with a flat sealing face, an O-ring seated in a face groove, and a straight UNF thread. The joint is completed by the female swivel nut of the mating hose or tube assembly, which pulls the two flat faces together and compresses the O-ring between them. This ORFS adapter is supplied as the stud only, so the swivel nut belongs to the hose end or tube end and not to this part.<\/p>\r\n\r\n\r\n\r\n
Principais vantagens<\/h2>\r\n\r\n\r\n\r\n
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Flat face O-ring seal at both ends, so the joint needs no thread sealant and no torque-dependent thread seal.<\/li>\r\n\r\n\r\n\r\n
Equal-ended and reducing combinations in one series, from 9\/16″x18 up to 2″x12.<\/li>\r\n\r\n\r\n\r\n
The O-ring code is printed against each end in table 2.5, so the seal for each side is specified with the part number.<\/li>\r\n\r\n\r\n\r\n
Centre hex from 17 mm to 55 mm across flats, so standard wrenches hold the body without special tooling.<\/li>\r\n\r\n\r\n\r\n
Carbon steel with trivalent chromium zinc plating as standard; 304 or 316 stainless steel available for corrosive service.<\/li>\r\n\r\n\r\n\r\n
Every batch checked against the drawing with thread gauges before packing.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
1. What a 1F Adapter Does<\/h2>\r\n\r\n\r\n\r\n
A 1F adapter is an ORFS male adapter: a straight stud with a male ORFS end at each side. It connects a tube or hose assembly terminated with an ORFS female swivel nut to a second ORFS connection, either the same size or a reduced size.<\/p>\r\n\r\n\r\n\r\n
The part does one job: it moves fluid between two ORFS flat face ports without changing direction. Equal-ended rows such as 1F-08 carry the same thread at both ends. Reducing rows such as 1F-08-10 carry a smaller ORFS end at the first position and a larger ORFS end at the second, which converts a line without an additional reducer.<\/p>\r\n\r\n\r\n\r\n
Because the seal is a face seal, the condition of the two flat faces and the two O-rings governs the result. This series belongs to the SAE J1453 O-ring face seal family, and as an O-ring adapter it reseals each time a joint is broken and remade.<\/p>\r\n\r\n\r\n\r\n
2. 1F Specifications<\/h2>\r\n\r\n\r\n\r\n
2.1 Connection 1 – ORFS male O-ring end (E)<\/h3>\r\n\r\n\r\n\r\n
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Thread standard and family: SAE J1453, ORFS (O-ring face seal) family.<\/li>\r\n\r\n\r\n\r\n
Thread size range available: 9\/16″x18 to 2″x12, in the steps printed in table 2.5.<\/li>\r\n\r\n\r\n\r\n
Gender: male stud end, with an external straight thread and a flat sealing face.<\/li>\r\n\r\n\r\n\r\n
Sealing method: an elastomeric O-ring seated in a groove in the flat face, compressed against the flat face of the mating ORFS port or swivel nut.<\/li>\r\n\r\n\r\n\r\n
Mating port standard: SAE J1453 ORFS port, made up with the matching ORFS female swivel nut.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
2.2 Connection 2 – ORFS male O-ring end (F)<\/h3>\r\n\r\n\r\n\r\n
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Thread standard and family: SAE J1453, ORFS (O-ring face seal) family.<\/li>\r\n\r\n\r\n\r\n
Thread size range available: 9\/16″x18 to 2″x12. In a reducing part this end is the larger of the two threads printed in the row.<\/li>\r\n\r\n\r\n\r\n
Gender: male stud end, with an external straight thread and a flat sealing face.<\/li>\r\n\r\n\r\n\r\n
Sealing method: an elastomeric O-ring seated in a groove in the flat face, compressed against the flat face of the mating ORFS port or swivel nut.<\/li>\r\n\r\n\r\n\r\n
Mating port standard: SAE J1453 ORFS port, made up with the matching ORFS female swivel nut.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
Connections 1 and 2 are the same family and the same sealing type; the only difference is size. Read the E column as the first end and the F column as the second end, as printed in table 2.5.<\/p>\r\n\r\n\r\n\r\n
2.3 Construction and Materials<\/h3>\r\n\r\n\r\n\r\n
The body is machined from bar stock on CNC lathes, with the two threads, the two flat faces, the two O-ring grooves and the hex turned so that the faces stay square to their threads and concentric with each other.<\/p>\r\n\r\n\r\n\r\n
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Body material: carbon steel as standard; 304 stainless steel or 316 stainless steel on request; brass for selected sizes.<\/li>\r\n\r\n\r\n\r\n
Plating and finish: trivalent chromium zinc plating (Cr3+) for carbon steel as standard; zinc-nickel plating available. Plating thickness and corrosion performance are confirmed per order rather than published as a series figure.<\/li>\r\n\r\n\r\n\r\n
Seal material options: NBR, FKM and EPDM O-rings for the face grooves, matched to the fluid and the temperature of the circuit.<\/li>\r\n\r\n\r\n\r\n
Machining process: bar-stock turning, thread form produced to the port standard, face groove checked against the drawing, O-ring fitted and the assembly checked before packing.<\/li>\r\n\r\n\r\n\r\n
Hex feature: a single centre hex (S1) on the body, from 17 mm to 55 mm across flats depending on size. There is no bulkhead feature and no lock nut in this series.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
2.4 Pressure and Temperature<\/h3>\r\n\r\n\r\n\r\n
Working pressure for a 1F adapter is not set by the series code. It is governed by the thread size, the wall thickness of the stud and the mating tube, the sealing method and the material selected. Working pressure for these sizes is confirmed per order by HENGHUA engineering, based on the thread size, sealing method and material selected.<\/p>\r\n\r\n\r\n\r\n
Temperature is a material question and is stated here as a material fact rather than a performance claim. For NBR, the working range of the elastomer is approximately -30\u00b0C to +100\u00b0C. For FKM (Viton-type), it is approximately -20\u00b0C to +200\u00b0C. For EPDM, it is approximately -40\u00b0C to +120\u00b0C. Because the O-ring is the sealing element of this series, these figures apply directly to the adapter itself, not only to other components in the circuit.<\/p>\r\n\r\n\r\n\r\n
Carbon steel with zinc plating suits general hydraulic service; specify 304 or 316 stainless steel for corrosive, offshore or washdown environments.<\/p>\r\n\r\n\r\n\r\n
2.5 Part Number and Dimension Table<\/h3>\r\n\r\n\r\n\r\n
The table below is the complete printed size range of the 1F series. All length and hex dimensions are in millimetres.<\/p>\r\n\r\n\r\n\r\n
What each column means<\/strong><\/p>\r\n\r\n\r\n\r\n
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N.\u00ba DA PE\u00c7A.<\/strong> – the HENGHUA part number. The series prefix 1F<\/code> is followed by one size code for an equal-ended part, or by two size codes separated by a dash for a reducing part.<\/li>\r\n\r\n\r\n\r\n
E<\/strong> – the ORFS thread of connection 1, printed as diameter x threads per inch in the SAE style, for example 9\/16\"X18<\/code>.<\/li>\r\n\r\n\r\n\r\n
F<\/strong> – the ORFS thread of connection 2, in the same notation. When E and F are identical the part is equal-ended.<\/li>\r\n\r\n\r\n\r\n
E END<\/strong> – the O-ring code for connection 1, for example O011<\/code>. This is the seal that fits the face groove at the E end, so the seal for each side is ordered with the part.<\/li>\r\n\r\n\r\n\r\n
F END<\/strong> – the O-ring code for connection 2, for example O018<\/code>. In a reducing part the two codes differ, so each end is quoted with its own code.<\/li>\r\n\r\n\r\n\r\n
A<\/strong> – the length from the sealing face of connection 1 to the hex face on that side, in millimetres, as marked on the series drawing.<\/li>\r\n\r\n\r\n\r\n
B<\/strong> – the equivalent length from the sealing face of connection 2 to the hex face on that side, in millimetres.<\/li>\r\n\r\n\r\n\r\n
L<\/strong> – the overall length of the part from face to face, in millimetres.<\/li>\r\n\r\n\r\n\r\n
S1<\/strong> – the hex across flats, in millimetres, used to hold the body with a wrench while the swivel nut is tightened.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
Thread size and dash chart<\/strong><\/p>\r\n\r\n\r\n\r\n
The dash code is the size step, following the nominal hose-size convention used across the SAE families. The printed thread and the printed O-ring code for each equal-ended size are:<\/p>\r\n\r\n\r\n\r\n
The 1F series starts at size 04 and runs to size 24 in the steps printed above; it does not carry the intermediate codes that some other families use.<\/p>\r\n\r\n\r\n\r\n
3. How to Read a 1F Part Number<\/h2>\r\n\r\n\r\n\r\n
A 1F adapter part number has three elements: the series prefix, one or two size codes, and no sealing suffix on this series.<\/p>\r\n\r\n\r\n\r\n
The prefix 1F<\/code> identifies the family: a straight ORFS male adapter with a flat face O-ring seal at both ends, made to SAE J1453. A different prefix in the same catalogue identifies a different geometry, such as an elbow, a female swivel version, a plug, or a cross standard adapter with an NPT, BSPT or metric port at the other end.<\/p>\r\n\r\n\r\n\r\n
The size code is the ORFS dash size. One code means both ends are the same size. Two codes separated by a dash mean the first code is connection 1 (the E column) and the second code is connection 2 (the F column), which makes the part a reducer.<\/p>\r\n\r\n\r\n\r\n
Worked example: 1F-08-10.<\/strong><\/p>\r\n\r\n\r\n\r\n
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1F<\/code> – straight ORFS male stud with a flat face O-ring seal, SAE J1453.<\/li>\r\n\r\n\r\n\r\n
08<\/code> – connection 1 is the 13\/16″x16 size, with O-ring code O014.<\/li>\r\n\r\n\r\n\r\n
10<\/code> – connection 2 is the 1″x14 size, with O-ring code O016.<\/li>\r\n\r\n\r\n\r\n
From the table: A is 12.8 mm, B is 15.5 mm, L is 40 mm and S1 is 27 mm.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
A buyer ordering 1F-08-10 receives a straight stud with a smaller ORFS end and a larger ORFS end, and must confirm that the face groove at each end takes the O-ring code printed against that end, because the face diameters differ. The same size codes are used across the ORFS family, so an elbow or a plug version at a given size fits the same mating swivel nuts.<\/p>\r\n\r\n\r\n\r\n
4. Installation and Fitment<\/h2>\r\n\r\n\r\n\r\n
An ORFS joint is assembled by hand first and then tightened to compress the O-ring. HENGHUA does not print a single torque figure for the series, because the correct tightening depends on the swivel nut fitted, the mating port material and the size. Follow the assembly recommendation of the port or hose manufacturer, or confirm the tightening figure with HENGHUA engineering per order. Bring the swivel nut up by hand until the faces touch, then tighten in stages, and never use an extension bar on a face seal joint.<\/p>\r\n\r\n\r\n\r\n
Face and seal handling: keep the flat face of the stud and the flat face of the mating port free of nicks, burrs and paint. Wipe both faces with a lint-free cloth and inspect the O-ring for cuts before assembly. An O-ring that has hardened or taken a flattened set must be replaced.<\/p>\r\n\r\n\r\n\r\n
Thread preparation: ORFS threads are not the sealing element, so do not wrap them with thread tape or use a thread sealant as a leak cure. A light oil on the threads lets the swivel nut run up smoothly without distorting the O-ring.<\/p>\r\n\r\n\r\n\r\n
Contamination control: cap open ends before storage and before the line goes back into service, because debris that reaches the face groove scores the sealing face and produces a seep that no further tightening removes.<\/p>\r\n\r\n\r\n\r\n
Alignment: bring the mating hose end or port squarely to the stud before starting the nut, because a line pulled sideways into the face loads the O-ring on one side and weeps at first pressure.<\/p>\r\n\r\n\r\n\r\n
Reuse policy: an O-ring adapter of this series can be reused whenever the faces and the grooves are undamaged, with a new O-ring fitted. The swivel nut and the O-ring are the wear items, and the O-ring is replaced whenever the joint has been broken.<\/p>\r\n\r\n\r\n\r\n
Common fitment errors and their symptoms:<\/p>\r\n\r\n\r\n\r\n
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Fitting the wrong dash size. Symptom: the thread starts but the faces never touch, or the nut bottoms out with a gap that weeps.<\/li>\r\n\r\n\r\n\r\n
Reusing a hardened O-ring. Symptom: a leak at first pressure and a seal that has taken the shape of the groove.<\/li>\r\n\r\n\r\n\r\n
Overtightening to stop a seep. Symptom: an extruded or cut O-ring and a leak that returns immediately.<\/li>\r\n\r\n\r\n\r\n
Mixing an ORFS end with a JIC 37\u00b0 flare end. Symptom: the thread may start at some sizes but the seats are a flat face and a cone, so the joint cannot seal.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
Confirm the part number against the line list and check that both threads and both O-ring codes match the mating connections.<\/li>\r\n\r\n\r\n\r\n
Inspect the two flat faces and the two face grooves for nicks, corrosion and previous overtightening marks.<\/li>\r\n\r\n\r\n\r\n
Clean the faces, the grooves and the threads with a lint-free cloth and a compatible cleaning fluid.<\/li>\r\n\r\n\r\n\r\n
Fit the correct O-ring to each face groove and confirm that it sits fully in the groove without twisting.<\/li>\r\n\r\n\r\n\r\n
Bring the mating swivel nut square to the stud by hand, run it up until the faces touch, then tighten in stages to the recommended figure without an extension bar.<\/li>\r\n\r\n\r\n\r\n
Pressurise the circuit, check both ends for weeping, and re-check the tightness after the first thermal cycle.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n
5. Applications and Industries<\/h2>\r\n\r\n\r\n\r\n
Application tags for this series: hydraulic systems, water jetting, oil and gas, industrial equipment, construction machinery, agriculture, marine, material handling. An ORFS adapter in this series is specified by its thread pair rather than by industry, so the same part serves several of these sectors.<\/p>\r\n\r\n\r\n\r\n
Cross-standard equipment integration.<\/strong> Equipment built with SAE J1453 ORFS ports often has to be joined to a line assembled to a different face seal size. Reducing rows such as 1F-06-10 let one part step between a smaller hose run and a larger manifold port.<\/p>\r\n\r\n\r\n\r\n
Repair and replacement.<\/strong> Maintenance crews fit a 1F adapter when a damaged ORFS stud or a scored face has to be replaced on site. Because the series covers equal-ended and reducing combinations, the replacement is usually drawn from stock.<\/p>\r\n\r\n\r\n\r\n
High-pressure test benches.<\/strong> Test rigs need repeatable, replaceable interfaces between the pump side, the gauge line and the test article. The flat face joint reseals after each break and remake, and the centre hex holds the stud while the nut is tightened.<\/p>\r\n\r\n\r\n\r\n
OEM assembly lines.<\/strong> For production lines, this SAE adapter is supplied to a drawing-based specification with the plating, material and O-ring compound fixed per programme, and packed for line-side delivery.<\/p>\r\n\r\n\r\n\r\n
6. Replacement and Cross-Reference Guide<\/h2>\r\n\r\n\r\n\r\n
Cross-reference for a hydraulic adapter is organised by standard and sealing method, never by brand. Two SAE adapters interchange only if the standard, the thread size, the sealing method and the seal type all match.<\/p>\r\n\r\n\r\n\r\n
A 1F adapter in this series is a SAE J1453 straight stud with a flat face O-ring seal at both ends. It is not interchangeable with a JIC 37\u00b0 flare fitting, which seals metal-to-metal on a conical flare face under SAE J514; the two seats will not mate. It is not interchangeable with a SAE O-ring boss stud either, because a boss stud seals by an O-ring on a straight thread inside the port plus a lock nut. Nor does it interchange with an NPT fitting, which seals on the thread flanks under ANSI\/ASME B1.20.1 and needs a sealant.<\/p>\r\n\r\n\r\n\r\n
To identify the correct replacement for a male adapter of this family, measure three things.<\/p>\r\n\r\n\r\n\r\n
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Thread.<\/strong> Measure the outside diameter and the pitch. A 9\/16″ end measures about 14.3 mm outside diameter with 18 threads per inch; a 13\/16″ end measures about 20.6 mm with 16 threads per inch. Record diameter and pitch together, because the same diameter appears with a different pitch in another family.<\/li>\r\n\r\n\r\n\r\n
Face and groove.<\/strong> Confirm that the end has a flat sealing face with an O-ring groove rather than a cone or a bare thread, and measure the face diameter, because the O-ring code must match the face it sits in.<\/li>\r\n\r\n\r\n\r\n
Seal type.<\/strong> Confirm whether the joint relies on a flat face O-ring, a metal cone or the thread itself. If the part in your hand has no groove and no O-ring, it belongs to another family.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n
Where the port standard is not SAE J1453, a cross standard adapter of the same size is the correct part rather than a forced thread. Record the measurements with the part number and the O-ring code, and HENGHUA can match the replacement to the series and size code from the printed table in section 2.5.<\/p>\r\n\r\n\r\n\r\n
7. Ordering, Packaging and Delivery<\/h2>\r\n\r\n\r\n\r\n
To order this SAE adapter, give the following information:<\/p>\r\n\r\n\r\n\r\n
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Series code: 1F<\/code>.<\/li>\r\n\r\n\r\n\r\n
Full part number, for example 1F-08-10, taken from table 2.5.<\/li>\r\n\r\n\r\n\r\n
ORFS thread size for connection 1 and connection 2, read from the E and F columns, with the O-ring code from the E END and F END columns.<\/li>\r\n\r\n\r\n\r\n
Seal material for the face O-rings: NBR, FKM or EPDM.<\/li>\r\n\r\n\r\n\r\n
Body material and plating: carbon steel with trivalent chromium zinc plating, zinc-nickel plating, or 304 or 316 stainless steel.<\/li>\r\n\r\n\r\n\r\n
Quantity, and the destination and packing format required.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
Packaging formats: bulk cartons for line-side consumption, small boxes for distributor shelves and labelled bags for service kits, each labelled with the part number, the two thread sizes, the two O-ring codes and the quantity.<\/p>\r\n\r\n\r\n\r\n
Sample orders: validation samples and first-article parts are available for OEM programmes, including drawing-based manufacture of specials where the printed table does not cover the required combination.<\/p>\r\n\r\n\r\n\r\n
Lead time is confirmed per order, because it depends on the size, the material, the plating and the quantity. Send the requirement with the quantity and the required date, and HENGHUA confirms the schedule with the quotation. As a hydraulic adapter manufacturer and hydraulic adapter supplier, HENGHUA can quote the ORFS adapter with its face O-rings as one matched item.<\/p>\r\n\r\n\r\n\r\n
8. FAQ<\/h2>\r\n\r\n\r\n\r\n
What is the difference between JIC 37\u00b0 flare and ORFS, and which should I use?<\/strong><\/p>\r\n\r\n\r\n\r\n
A JIC 37\u00b0 flare joint seals metal-to-metal on a 37\u00b0 conical flare face under SAE J514. An ORFS joint seals a flat face against an elastomeric O-ring under SAE J1453. Choose the family that matches the port already on the equipment, because the two are not interchangeable. The 1F series is on the ORFS side, so a port with a machined flat face and a groove calls for this series.<\/p>\r\n\r\n\r\n\r\n
Can NPT and BSPT be interchanged?<\/strong><\/p>\r\n\r\n\r\n\r\n
No. NPT is a 60\u00b0 taper pipe thread under ANSI\/ASME B1.20.1, and BSPT is a 55\u00b0 taper pipe thread under ISO 7-1. The thread form, the angle and the pitch differ, so the two will not seal even though some sizes start by hand. Use the thread the port is machined to, and order a cross standard adapter when the two sides differ.<\/p>\r\n\r\n\r\n\r\n
How do I identify the correct 1F adapter size?<\/strong><\/p>\r\n\r\n\r\n\r\n
Measure the thread outside diameter and the pitch on the mating port, then read across the E and F columns of table 2.5 for that thread pair. When the thread, the face and the O-ring code all match a printed row, that row is the correct part number.<\/p>\r\n\r\n\r\n\r\n
What seal material should I select for my fluid and temperature?<\/strong><\/p>\r\n\r\n\r\n\r\n
For general mineral hydraulic oil within -30\u00b0C to +100\u00b0C, NBR is the usual choice. For higher temperatures up to approximately +200\u00b0C, or where the fluid attacks NBR, choose FKM (Viton-type). For water, water-glycol and many water-based fluids, EPDM is the option, with a working range of approximately -40\u00b0C to +120\u00b0C. Because the O-ring is the sealing element of this O-ring adapter, the choice affects the adapter itself and not only the rest of the circuit.<\/p>\r\n\r\n\r\n\r\n
How is the working pressure of this adapter determined?<\/strong><\/p>\r\n\r\n\r\n\r\n
Working pressure is not fixed by the series code. It is governed by the thread size, the wall thickness of the stud and the tube, the sealing method and the material selected. Working pressure for these sizes is confirmed per order by HENGHUA engineering, based on the thread size, sealing method and material selected, against the intended circuit.<\/p>\r\n\r\n\r\n\r\n
What is the minimum order quantity and can I get samples?<\/strong><\/p>\r\n\r\n\r\n\r\n
Minimum order quantity depends on the size code, the material and the plating, so it is confirmed with the quotation rather than published as one series figure. Samples and validation parts are available for OEM and distributor evaluation, including specials made to a drawing.<\/p>\r\n\r\n\r\n\r\n
Is the O-ring included with the 1F adapter?<\/strong><\/p>\r\n\r\n\r\n\r\n
Yes. The 1F stud is supplied with an O-ring for each end, in the compound selected at order. The E END and F END columns of table 2.5 give the code for each end, so the two ends of a reducing part are ordered with their own seal. Replacement O-rings are available separately for service kits.<\/p>\r\n\r\n\r\n\r\n
Send your requirement to HENGHUA<\/strong><\/p>\r\n\r\n\r\n\r\n
Send the part number, the two ORFS thread sizes, the O-ring codes, the seal compound, the material and plating, and the quantity. HENGHUA confirms the match to the printed table, the seal options and the delivery schedule, and quotes the 1F adapter that fits your circuit.<\/p>\r\n\r\n\r\n\r\n
![\"1F](\"https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/09\/orfs-male-o-ring-adapter-1f-dimensions.png\")
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